本文主要是介绍Android 乱七八糟的设置记录，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
Android 乱七八糟的设置记录
1、添加永不休眠
frameworks/base/packages/SettingsProvider/res/values/defaults.xml
<integer name="def_screen_off_timeout">0</integer> // 默认休眠时间设为0
frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
private void updateLockScreenTimeout() {synchronized (mScreenLockTimeout) {boolean enable = (mAllowLockscreenWhenOn && mAwake &&mKeyguardDelegate != null && mKeyguardDelegate.isSecure(mCurrentUserId));if (mLockScreenTimerActive != enable) {if (enable) {if (localLOGV) Log.v(TAG, "setting lockscreen timer");mHandler.removeCallbacks(mScreenLockTimeout); // remove any pending requestsif (mLockScreenTimeout != 0) { // 添加判断，时间为0则永不休眠，不为0继续执行mHandler.postDelayed(mScreenLockTimeout, mLockScreenTimeout);}} else {if (localLOGV) Log.v(TAG, "clearing lockscreen timer");mHandler.removeCallbacks(mScreenLockTimeout);}mLockScreenTimerActive = enable;}}}
frameworks/base/services/core/java/com/android/server/power/PowerManagerService.java
private void updateUserActivitySummaryLocked(long now, int dirty) {// Update the status of the user activity timeout timer.if ((dirty & (DIRTY_WAKE_LOCKS | DIRTY_USER_ACTIVITY| DIRTY_WAKEFULNESS | DIRTY_SETTINGS)) != 0) {mHandler.removeMessages(MSG_USER_ACTIVITY_TIMEOUT);long nextTimeout = 0;if (mWakefulness == WAKEFULNESS_AWAKE|| mWakefulness == WAKEFULNESS_DREAMING|| mWakefulness == WAKEFULNESS_DOZING) {......// 如果设置时间为0，则跳过 {if (mScreenOffTimeoutSetting != 0) { // never screenOffif (mUserActivitySummary != 0 && nextTimeout >= 0) {Message msg = mHandler.obtainMessage(MSG_USER_ACTIVITY_TIMEOUT);msg.setAsynchronous(true);mHandler.sendMessageAtTime(msg, nextTimeout);}} else {mUserActivitySummary |= USER_ACTIVITY_SCREEN_BRIGHT;}// }} else {mUserActivitySummary = 0;}......}}
packages/apps/Settings/res/values/arrays.xml
<string-array name="screen_timeout_entries"><!-- 设置中添加never选项 --><item>never</item><string-array name="screen_timeout_values" translatable="false"><!-- 设置中添加nerver时间 0 --><item>0</item>
2、刷完bootimage WIFI无法打开
相同环境下编译 vendor/qcom/opensource/wlan/prima/ 目录下代码，生成 pronto_wlan.ko
push到机器 vendor/lib/modules/pronto/ 目录即可
3、设置persist.sys属性值
属性值以persist.sys.开头的属于持久化的，即重启后设置的值依然保存。需要系统权限，即使用系统签名并在AndroidManifest.xml 声明android:sharedUserId=“android.uid.system”
4、android 源码网站
https://www.androidos.net.cn/sourcecode
5、fastboot 常见指令
fastboot erase system 擦除分区
fastboot getvar secure 查看是否secure boot签名的
fastboot --set-active=a 设置A/B分区
6、签名及查看签名
java -jar signapk.jar testkey.x509.pem testkey.pk8 old.apk new.apk
keytool -printcert -file META-INF/CERT.RSA
7、Linux权限说明
权限说明（共十位）：一些系统文件有权限限制，随意push不同步修改还原权限会导致手机无法开机，例如build.prop文件
-rw-------
1位：d：文件夹
-：文件
2-4位：当前用户权限
5-7位：当前用户所在组权限
8-10位：其他用户权限
权限都有三个二进制数字组成，代表不同的权限。
如：二进制110 —> rw- 转换为十进制为6 代表rw-可读可写
111 rwx 转换为十进制为7 代表rwx可读可写可运行
chown root:shell xxx 修改文件用户和组,仅限root用户使用
chmod 0777 xxx 修改文件权限为0777
这篇关于Android 乱七八糟的设置记录的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
